david muir is with the romney campaign tonight in ohio. david. >> reporter: diane, good evening to you. as you know no republican has won the white house without ohio. in fact those polls a bit of a reality check for the romney campaign. as for the convention bounce president obama received it certainly was on mitt romney's mind today. before arriving in ohio, mitt romney on stage with a former president, speaking at a forum for bill clinton's global initiative. >> governor, i thank you for being here, the podium is yours. >> reporter: a warm welcome from clinton -- and a wry response from romney. >> if there's one thing we've learned in this election season, by the way, is that a few words from bill clinton can do a man a lot of good. [ applause ] [ laughter ] all i have to do is wait a couple of days for that bounce. [ laughter ] >> reporter: in reality, romney can't afford to wait which is why he's in ohio tonight side by side with his running mate for the first time in more than a month. >> ohio! >> reporter: no longer are they making